HEI Conversion wiring question

Yes you can splice the brown and blue, "why you need them"

The dark blue is "ignition run" or IGN1 and is hot ONLY in "run," it loses power during "start."............

Which is why you need the brown, the resistor bypass circuit. It is the ONLY wire (for ignition) that is hot during cranking.

I don't use a resistor with HEI Even with a stock Mopar coil